Multilevel Dynamic Voltage Restorer

ABSTRACT:

This letter exhibits the usage and control of a high voltage dynamic voltage restorer (HVDVR) for use in power conveyance system to adjust for lists in utility voltages. The proposed HVDVR is executed utilizing a staggered inverter topology with secluded dc vitality stockpiles, permitting the immediate association of the HVDVR to the dissemination arrange without utilizing a massive and exorbitant arrangement infusion transformer. A control calculation, consolidating P+resonant and Posicast compensators, is likewise exhibited for controlling the HVDVR with immaculate reference voltage following and powerful damping of transient voltage motions at the moment of droop remuneration. At last, recreation results are displayed to confirm the execution of the proposed staggered HVDVR.

  

BLOCK DIAGRAM:

Fig. 1. System configuration with dynamic voltage restoration

 

EXPECTED SIMULATION RESULTS:

Fig.2 Cascaded five-level HVDVR controlled using multi-loop feedback and feedforward control (without Posicast). Top to bottom: v ; v , and v

Fig 3. Cascaded five-level HVDVR controlled using multi-loop feedback and feedforward control (with Posicast). Top to bottom: v ; v , and v

Fig. 4. Cascaded five-level HVDVR switched waveforms. Top to bottom: upper H-bridge voltage, lower H-bridge voltage and resultant inverter voltage

Fig.5. Binary seven-level HVDVR switched waveforms. Top to bottom: upper H-bridge voltage, lower H-bridge voltage and resultant inverter voltage

 

CONCLUSION:

This letter shows the usage and control of a HVDVR for remunerating utility voltage lists. The HVDVR is actualized utilizing the fell staggered inverter topology with the upsides of enhanced unwavering quality and direct association of the HVDVR to the circulation arrange without the utilization of a massive and expensive arrangement infusion transformer. Other separated inverter topologies can likewise be utilized for indistinguishable reason from exhibited utilizing the twofold inverter, yet the subsequent HVDVR can be less solid under semiconductor disappointment conditions. The fell HVDVR is controlled utilizing a 2-DOF control conspire joining both P full and Posicast compensators, to accomplish immaculate reference voltage following and successful damping of transient voltage motions. The execution of the HVDVR, controlled utilizing diverse control procedures, has been tried broadly in Matlab/Simulink reproduction.

Leave a Reply

Your email address will not be published. Required fields are marked *